Skip to content

Latest commit

 

History

History
306 lines (246 loc) · 22.3 KB

sec-design.md

File metadata and controls

306 lines (246 loc) · 22.3 KB

BUSINESS POSTURE

PestPHP is a testing framework for PHP. Its primary business goal is to provide a more enjoyable and efficient testing experience for PHP developers. By offering a more expressive and user-friendly syntax compared to traditional PHPUnit, PestPHP aims to increase developer productivity, encourage more comprehensive testing, and ultimately contribute to higher quality PHP applications.

Business Priorities:

  • Developer Experience: The framework must be easy to learn, use, and integrate into existing PHP projects.
  • Stability and Reliability: The framework needs to be stable and reliable to gain developer trust and adoption.
  • Performance: Testing should be fast and efficient to minimize development feedback loops.
  • Community Growth: A strong and active community is crucial for the long-term success and evolution of the framework.

Business Risks:

  • Adoption Risk: If developers do not find PestPHP significantly better than existing solutions, adoption may be limited, hindering the project's goals.
  • Security Vulnerabilities in Framework: If security vulnerabilities are discovered in PestPHP itself, it could damage the framework's reputation and discourage adoption. While PestPHP is not directly involved in application security, vulnerabilities could lead to supply chain attacks or be exploited in development environments.
  • Compatibility Issues: Incompatibility with certain PHP versions, extensions, or popular libraries could limit the framework's usability and adoption.
  • Lack of Community Support: If the community doesn't grow and actively contribute, the framework's development and maintenance could stagnate.

SECURITY POSTURE

Existing Security Controls:

  • security control: Reliance on underlying PHP runtime security. PestPHP is a PHP library and depends on the security of the PHP environment it runs in. (Implemented by: PHP runtime environment)
  • security control: Dependency management via Composer. PestPHP uses Composer for dependency management, leveraging Composer's security features for package integrity. (Implemented by: Composer and Packagist)
  • security control: Open Source and Community Review. As an open-source project, the PestPHP codebase is publicly accessible for review, potentially leading to community-driven identification of security issues. (Implemented by: GitHub and Open Source Community)

Accepted Risks:

  • accepted risk: Vulnerabilities in dependencies. PestPHP relies on third-party packages, and vulnerabilities in these dependencies could indirectly affect PestPHP users.
  • accepted risk: Misuse of framework by developers. Developers might use PestPHP in insecure ways or write insecure tests, although this is not a direct vulnerability in PestPHP itself.
  • accepted risk: Development environment security. Security of development environments where PestPHP is used is assumed to be the responsibility of the developers and organizations using it.

Recommended Security Controls:

  • security control: Automated Dependency Scanning. Implement automated dependency scanning to identify and address vulnerabilities in PestPHP's dependencies. (To be implemented in: CI/CD pipeline)
  • security control: Static Application Security Testing (SAST). Integrate SAST tools into the CI/CD pipeline to automatically scan the PestPHP codebase for potential security vulnerabilities. (To be implemented in: CI/CD pipeline)
  • security control: Secure Release Process. Establish a secure release process that includes code review, security testing, and signed releases to ensure the integrity of PestPHP distributions. (To be implemented in: Release management process)

Security Requirements:

  • Authentication: Not directly applicable to a testing framework. PestPHP itself does not handle user authentication. However, tested applications might, and PestPHP should be able to test authentication mechanisms securely.
  • Authorization: Not directly applicable to a testing framework. PestPHP does not enforce authorization. However, tested applications will, and PestPHP should be able to test authorization logic.
  • Input Validation: Relevant for PestPHP in terms of handling test inputs and configuration. The framework should avoid vulnerabilities related to processing malicious test data or configuration.
  • Cryptography: Potentially relevant if PestPHP needs to handle or report on cryptographic operations in tested applications. PestPHP itself should not introduce cryptographic vulnerabilities. If PestPHP provides features related to testing cryptographic functionality, these features should be implemented securely.

DESIGN

C4 CONTEXT

flowchart LR
    subgraph "PHP Development Environment"
        PestPHP["PestPHP Framework"]
    end
    Developer["PHP Developer"]
    Composer["Composer Package Manager"]
    PHPRuntime["PHP Runtime Environment"]
    CI_CD["CI/CD System"]

    Developer --> PestPHP: Writes and runs tests
    PestPHP --> PHPRuntime: Executes tests
    PestPHP --> Composer: Manages dependencies
    Developer --> Composer: Installs PestPHP
    PestPHP --> CI_CD: Runs tests in CI/CD pipeline
    CI_CD --> Developer: Reports test results

    style PestPHP fill:#f9f,stroke:#333,stroke-width:2px
Loading

Context Diagram Elements:

  • Name: PHP Developer

    • Type: Person
    • Description: Software developers who use PestPHP to write and execute tests for their PHP applications.
    • Responsibilities: Writes tests using PestPHP syntax, runs tests locally and in CI/CD environments, interprets test results.
    • Security controls: Responsible for securing their development environments and writing secure tests.

  • Name: PestPHP Framework

    • Type: Software System
    • Description: A PHP testing framework designed to provide a more enjoyable and expressive testing experience. Distributed as a Composer package.
    • Responsibilities: Provides a testing DSL, test runner, assertion library, and reporting capabilities. Executes tests and provides results.
    • Security controls: Input validation of test configurations and inputs, secure handling of dependencies, adherence to secure coding practices in framework development.

  • Name: PHP Runtime Environment

    • Type: Software System
    • Description: The PHP interpreter and environment required to execute PestPHP and the tested applications.
    • Responsibilities: Executes PHP code, provides core PHP functionalities, manages resources.
    • Security controls: PHP runtime security features, configuration hardening, regular updates to address vulnerabilities.

  • Name: Composer Package Manager

    • Type: Software System
    • Description: A dependency manager for PHP. Used to install and manage PestPHP and its dependencies.
    • Responsibilities: Resolves and installs PHP packages, manages package versions, ensures package integrity.
    • Security controls: Package signing and verification, vulnerability scanning of packages, secure package repository (Packagist).

  • Name: CI/CD System

    • Type: Software System
    • Description: Continuous Integration and Continuous Delivery systems (e.g., GitHub Actions, Jenkins) used to automate the build, test, and deployment processes of PHP applications, including running PestPHP tests.
    • Responsibilities: Automates testing workflows, executes PestPHP tests in a controlled environment, reports test results, integrates with other development tools.
    • Security controls: Secure pipeline configuration, access control to CI/CD system, secure storage of credentials, vulnerability scanning of CI/CD infrastructure.

C4 CONTAINER

flowchart LR
    subgraph "PHP Development Environment"
        PestPHP["PestPHP Framework\n(Composer Package)"]
    end
    PHPRuntime["PHP Runtime\n(PHP CLI)"]
    Composer["Composer Client\n(PHP Package Manager)"]
    TestFiles["Test Files\n(PHP Files)"]
    ConfigFile["Pest Configuration\n(pest.php)"]

    PestPHP -- Executes --> TestFiles: Runs tests defined in files
    PestPHP -- Reads --> ConfigFile: Reads configuration settings
    PestPHP -- Requires --> PHPRuntime: Requires PHP to execute
    Composer -- Installs --> PestPHP: Installs PestPHP package
    Developer -- Creates/Modifies --> TestFiles: Writes and updates tests
    Developer -- Configures --> ConfigFile: Configures PestPHP behavior

    style PestPHP fill:#f9f,stroke:#333,stroke-width:2px
Loading

Container Diagram Elements:

  • Name: PestPHP Framework (Composer Package)

    • Type: Container (Software Library/Framework)
    • Description: The PestPHP framework, distributed as a Composer package. Contains the core logic for test execution, DSL parsing, and reporting.
    • Responsibilities: Provides the testing DSL, test runner, assertion library, and reporting capabilities. Loads and executes test files, manages test execution flow, and generates test reports.
    • Security controls: Input validation of configuration files and test inputs, secure handling of file system operations, protection against code injection vulnerabilities, secure dependency management.

  • Name: PHP Runtime (PHP CLI)

    • Type: Container (Runtime Environment)
    • Description: The PHP command-line interface (CLI) interpreter used to execute PestPHP and the test suite.
    • Responsibilities: Executes PHP code, provides core PHP functionalities, manages memory and resources for PestPHP execution.
    • Security controls: PHP runtime security features, configured security settings in php.ini, regular updates to address vulnerabilities.

  • Name: Composer Client (PHP Package Manager)

    • Type: Container (Tool)
    • Description: The Composer command-line client used to install and manage PestPHP and its dependencies.
    • Responsibilities: Downloads and installs PestPHP package from package repositories, manages dependencies, updates packages.
    • Security controls: Secure download and installation of packages, verification of package integrity using signatures, secure communication with package repositories.

  • Name: Test Files (PHP Files)

    • Type: Container (Data Store/Files)
    • Description: PHP files containing the test suites written using PestPHP's DSL.
    • Responsibilities: Define the tests to be executed by PestPHP, contain test logic and assertions.
    • Security controls: Access control to test files, secure storage of test files, protection against unauthorized modification.

  • Name: Pest Configuration (pest.php)

    • Type: Container (Configuration File)
    • Description: The pest.php configuration file used to customize PestPHP's behavior, such as setting up test directories, global setup/teardown, and plugins.
    • Responsibilities: Defines configuration settings for PestPHP execution.
    • Security controls: Input validation of configuration parameters, secure file permissions for the configuration file, avoid storing sensitive information directly in the configuration file.

DEPLOYMENT

PestPHP is primarily a development-time tool and is not "deployed" in the traditional sense of a web application. However, it is used in various environments, including local development environments and CI/CD pipelines. A typical deployment scenario is its integration into a developer's local machine and a CI/CD pipeline. We will focus on the CI/CD pipeline deployment for this document as it represents a more structured and potentially security-sensitive environment.

flowchart LR
    subgraph "CI/CD Environment (e.g., GitHub Actions)"
        BuildAgent["CI Build Agent\n(Virtual Machine/Container)"]
    end
    subgraph "Code Repository (e.g., GitHub)"
        SourceCode["Source Code Repository\n(GitHub Repo)"]
    end

    SourceCode -- Triggers --> BuildAgent: Code changes trigger CI build
    BuildAgent -- Runs --> PestPHP: Executes PestPHP tests
    BuildAgent -- Uses --> PHPRuntime: PHP Runtime for test execution
    BuildAgent -- Uses --> Composer: Composer to install dependencies
    BuildAgent -- Generates --> TestReports["Test Reports\n(Artifacts)"]: Creates test reports
    BuildAgent -- Sends --> CI_CD_Dashboard["CI/CD Dashboard\n(Web Interface)"]: Updates test status

    style BuildAgent fill:#ccf,stroke:#333,stroke-width:2px
    style TestReports fill:#eee,stroke:#333,stroke-width:1px
Loading

Deployment Diagram Elements (CI/CD Pipeline):

  • Name: CI Build Agent (Virtual Machine/Container)

    • Type: Infrastructure (Compute Instance)
    • Description: A virtual machine or container in the CI/CD environment responsible for executing the build and test pipeline.
    • Responsibilities: Executes build scripts, runs PestPHP tests, manages dependencies, generates test reports, and interacts with other CI/CD components.
    • Security controls: Hardened operating system image, minimal software installed, regular security patching, access control to build agent, secure configuration of CI/CD agent software.

  • Name: Source Code Repository (GitHub Repo)

    • Type: Infrastructure (Code Storage)
    • Description: The Git repository (e.g., on GitHub) where the project's source code, including PestPHP tests, is stored.
    • Responsibilities: Stores source code, manages version history, provides access control to code.
    • Security controls: Access control to repository (authentication and authorization), branch protection, audit logging of repository access, vulnerability scanning of repository infrastructure.

  • Name: PHP Runtime (within Build Agent)

    • Type: Software (Runtime Environment)
    • Description: PHP runtime environment installed on the CI build agent, used to execute PestPHP tests.
    • Responsibilities: Executes PHP code within the CI/CD environment.
    • Security controls: Security configuration of PHP runtime, regular updates to address vulnerabilities, isolation within the build agent environment.

  • Name: Composer (within Build Agent)

    • Type: Software (Tool)
    • Description: Composer installed on the CI build agent, used to manage PestPHP dependencies during the CI build process.
    • Responsibilities: Installs PestPHP and its dependencies within the CI/CD environment.
    • Security controls: Secure download and installation of packages within the CI/CD environment, use of package integrity checks.

  • Name: Test Reports (Artifacts)

    • Type: Data (Files)
    • Description: Files generated by PestPHP containing the results of the test execution.
    • Responsibilities: Stores test execution results, provides information for test analysis and reporting.
    • Security controls: Access control to test report artifacts, secure storage of artifacts, potential sanitization of sensitive data in reports if necessary.

  • Name: CI/CD Dashboard (Web Interface)

    • Type: Software (Web Application)
    • Description: The web interface of the CI/CD system used to monitor build and test status, view test reports, and manage CI/CD pipelines.
    • Responsibilities: Provides a user interface for interacting with the CI/CD system, displays build and test results.
    • Security controls: Authentication and authorization for access to the dashboard, secure communication (HTTPS), protection against web application vulnerabilities (OWASP Top 10), audit logging of user actions.

BUILD

The build process for a project using PestPHP typically involves the following steps, focusing on the security aspects:

flowchart LR
    Developer["Developer"] --> CodeChanges["Code Changes\n(Pest Tests, Application Code)"]: Writes/Modifies Code
    CodeChanges --> VCS["Version Control System\n(e.g., Git)"]: Commits and Pushes Code
    VCS --> CI_CD["CI/CD System\n(e.g., GitHub Actions)"]: Triggers Build Pipeline
    CI_CD --> DependencyInstall["Dependency Installation\n(Composer install)"]: Installs Dependencies
    DependencyInstall --> SecurityScans["Security Scans\n(Dependency Scanning, SAST)"]: Performs Security Checks
    SecurityScans --> TestExecution["Test Execution\n(PestPHP Tests)"]: Runs PestPHP Tests
    TestExecution --> ArtifactCreation["Artifact Creation\n(Test Reports, Packages)"]: Creates Build Artifacts
    ArtifactCreation --> ArtifactStorage["Artifact Storage\n(CI/CD Artifact Storage)"]: Stores Build Artifacts

    style DependencyInstall fill:#eee,stroke:#333,stroke-width:1px
    style SecurityScans fill:#eee,stroke:#333,stroke-width:1px
    style TestExecution fill:#eee,stroke:#333,stroke-width:1px
    style ArtifactCreation fill:#eee,stroke:#333,stroke-width:1px
Loading

Build Process Elements:

  • Name: Developer

    • Type: Person
    • Description: Software developer writing and modifying code, including PestPHP tests.
    • Responsibilities: Writes secure code and tests, commits code changes to VCS.
    • Security controls: Secure development environment, code review practices, security awareness training.

  • Name: Version Control System (VCS) (e.g., Git)

    • Type: Software System
    • Description: System for managing and tracking changes to the codebase.
    • Responsibilities: Stores source code, manages version history, controls access to code.
    • Security controls: Access control (authentication and authorization), branch protection, commit signing, audit logging.

  • Name: CI/CD System (e.g., GitHub Actions)

    • Type: Software System
    • Description: Automates the build, test, and deployment pipeline.
    • Responsibilities: Orchestrates the build process, executes build steps, runs security scans and tests, manages build artifacts.
    • Security controls: Secure pipeline configuration, access control to CI/CD system, secure secrets management, build isolation, vulnerability scanning of CI/CD infrastructure.

  • Name: Dependency Installation (Composer install)

    • Type: Build Step
    • Description: Step in the CI/CD pipeline where Composer is used to install project dependencies, including PestPHP and its dependencies.
    • Responsibilities: Resolves and installs project dependencies.
    • Security controls: Use of composer.lock for reproducible builds, Composer's package integrity checks, potentially using private package repositories for internal dependencies.

  • Name: Security Scans (Dependency Scanning, SAST)

    • Type: Build Step
    • Description: Automated security scans performed during the build process. Includes dependency vulnerability scanning and Static Application Security Testing (SAST) of the codebase.
    • Responsibilities: Identifies potential security vulnerabilities in dependencies and the codebase.
    • Security controls: Integration of dependency scanning tools (e.g., composer audit), integration of SAST tools to scan PHP code, automated reporting of scan results, fail-build on critical vulnerabilities.

  • Name: Test Execution (PestPHP Tests)

    • Type: Build Step
    • Description: Execution of PestPHP tests as part of the build process.
    • Responsibilities: Runs automated tests to verify code functionality and identify regressions.
    • Security controls: Isolated test environment, secure test data management, reporting of test failures.

  • Name: Artifact Creation (Test Reports, Packages)

    • Type: Build Step
    • Description: Creation of build artifacts, such as test reports and potentially distributable packages.
    • Responsibilities: Generates and packages build artifacts.
    • Security controls: Secure artifact generation process, signing of artifacts, ensuring artifacts do not contain sensitive information unintentionally.

  • Name: Artifact Storage (CI/CD Artifact Storage)

    • Type: Software System
    • Description: Storage location for build artifacts within the CI/CD system.
    • Responsibilities: Stores build artifacts securely.
    • Security controls: Access control to artifact storage, secure storage mechanisms, retention policies for artifacts.

RISK ASSESSMENT

Critical Business Process:

  • Ensuring Software Quality: PestPHP directly supports the critical business process of ensuring software quality through testing. High-quality software reduces bugs, improves user satisfaction, and minimizes security vulnerabilities in applications built using PHP.

Data to Protect:

  • Test Code: The PestPHP test code itself is valuable intellectual property and should be protected from unauthorized access and modification. Sensitivity: Medium.
  • Application Code Under Test: The application code being tested by PestPHP is the primary asset. Its sensitivity depends on the nature of the application. For applications handling sensitive user data or critical business logic, the application code is highly sensitive. Sensitivity: High to Very High (depending on the application).
  • Test Data: Test data used in PestPHP tests might contain sensitive information, especially in integration or end-to-end tests. The sensitivity of test data is directly related to the sensitivity of the data handled by the application being tested. Sensitivity: Low to Very High (depending on the test data).
  • Test Reports: Test reports can contain information about the application's behavior and potential vulnerabilities. While less sensitive than the code itself, they should still be protected from unauthorized disclosure. Sensitivity: Low to Medium.

QUESTIONS & ASSUMPTIONS

Questions:

  • What is the primary use case for this design document? Is it for internal PestPHP development team security review, or for users of PestPHP to understand its security posture, or for a broader security audit?
  • What is the risk appetite of the organization or project using PestPHP? Is it a startup with a higher risk tolerance or a large enterprise with strict security requirements?
  • Are there any specific compliance requirements (e.g., GDPR, HIPAA, PCI DSS) that the applications tested with PestPHP must adhere to? This could influence the security requirements for the testing framework and its usage.
  • What level of security expertise is expected from the developers using PestPHP? Should the framework be designed to be secure by default and guide developers towards secure testing practices?

Assumptions:

  • PestPHP is primarily used for functional and unit testing of PHP applications, not for security testing itself (like penetration testing or vulnerability scanning).
  • The security of the applications tested with PestPHP is the ultimate responsibility of the developers and organizations building those applications. PestPHP aims to be a secure and reliable tool that aids in building quality software, but it is not a security solution in itself.
  • PestPHP is intended to be used in development and CI/CD environments, not in production environments. Security concerns are primarily focused on protecting development assets, ensuring the integrity of the framework, and preventing the introduction of vulnerabilities through the testing process.
  • The target audience for PestPHP is PHP developers with varying levels of security awareness. The framework should strive to be user-friendly and not impose unnecessary security burdens on developers while still promoting secure practices.